Aquatic exerciser



FIG. 1 is a top front perspective view of an aquatic exerciser showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a rear view thereof. 

The ornamental design for an aquatic exerciser, as shown and described. 